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pawlo.gom
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pawlo.gom

Problem with Iptables.

November 18, 2013 36.6k views
Hi. I have a problem with Iptables. I can`t use the command: sudo iptables -L, because the error is: FATAL: Could not load /lib/modules/3.2.0-55-virtual/modules.dep: No such file or directory iptables v1.4.12: can't initialize iptables table `filter': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. I have installed on my droplet (system ubuntu 12.04) Zpanel and fail2ban according to this guide: https://digitalocean.com/community/articles/how-to-protect-ssh-with-fail2ban-on-ubuntu-12-04 Please, help me. Thank for every piece of advice!
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16 Answers
kamaln7 MOD January 15, 2014
@Leandro: You have to install the kernel that you're using: 
sudo apt-get install linux-image-$(uname -r)


Once that's done, it should work. If it doesn't, try rebooting your droplet.
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  • geekmails July 5, 2014

    Thanks. Thats the one i needed.
    it solved my problem.
    Thanks a lot.

    just use the following command guys 

    sudo apt-get install linux-image-$(uname -r)
kamaln7 MOD November 20, 2013
You must install the kernel package corresponding to the kernel you set your droplet to boot from (using our control panel).
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pablo November 18, 2013
Check out How to Setup a Firewall with UFW on an Ubuntu and Debian Cloud Server.
How To Setup a Firewall with UFW on an Ubuntu and Debian Cloud Server
by Shaun Lewis
Learn how to setup a firewall with UFW on an Ubuntu / Debian cloud server.
Reply
vps November 18, 2013
Did you update your kernel by chance?

I had a similar problem with playing around with new kernel. Any update would break UFW.

Never bothered to try to find correct answer just moved kernel back to default.


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kamaln7 MOD November 20, 2013
In your case it would be 3.2.0-55-virtual
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will-v-king December 12, 2013
in my case, uname said the kernel is 3.2.0-55-virtual .
and it is 3.2.0-55-virtual in my control panel - settings - kernel.
but still got the error:
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE && iptables-save
FATAL: Could not load /lib/modules/3.2.0-55-virtual/modules.dep: No such file or directory
iptables v1.4.12: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
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will-v-king December 12, 2013
oh, I found the problem:
ls /lib/modules/
3.2.0-23-virtual

Reply
lpcorrea January 15, 2014
Hi Will, I´m having the same problem whit the same version, how do I update/upgrade the /lib/modules? In my case under this folder I have two folders (3.2.0-24-virtual and 3.2.0-48-virtual) and I´m using 3.2.0-55-virtual as you...
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martin.jozef March 23, 2014
Kamal Nasser, Thank you for the no hassle solution. It worked, ufw started working again after a reboot.
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dustinmatlock April 7, 2014
I'm having the same issue. I've not changed the kernal from what was installed.
Reply
chas.snider May 1, 2014
I moved it back to the default, but it still doesn't work.

uname -r
3.5.0-17-generic
ls /lib/modules/
drwxr-xr-x 4 root root 4096 May 1 11:03 3.5.0-17-generic

modprobe ip_tables
FATAL: Error inserting ip_tables (/lib/modules/3.5.0-17-generic/kernel/net/ipv4/netfilter/ip_tables.ko): Operation not permitted

FATAL: Error inserting ip_tables (/lib/modules/3.5.0-17-generic/kernel/net/ipv4/netfilter/ip_tables.ko): Operation not permitted
iptables v1.4.12: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
Reply
asb MOD May 1, 2014
@chas.snider: It sounds like there is a mismatch between the kernel you have installed and the kernel selected in the DigitalOcean panel. Make sure the versions match.
Reply
sdpagent August 14, 2014

sudo apt-get install linux-image-$(uname -r)

fixed the issue for me

Thanks @Kamal

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quim October 26, 2015

sudo apt-get install linux-image-$(uname -r)

worked for me also! thanks!

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Johnnierock August 15, 2016

What is the process for a solution for Centos 7?
Looks like I was in panic mode when I posted this question. I did correct the issue by injecting the new kernel from the management section and powered down and back up. Evidently the kernel is independently managed and I did not know that.

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simplylizz June 26, 2017

Another advice is to try reinstall kernel:
sudo apt-get install --reinstall linux-image-$(uname -r)

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